What is the difference between a DC stepper motor and an AC stepper motor?
Ac Vs Dc stepper motor
What is the difference between a DC stepper motor and an AC stepper motor? Difference between ac and dc stepper motor.
Stepper motor does not divide AC and DC, if it is unipolar control mode, the current flowing through the stepper motor is unidirectional, and when bipolar control, the current flowing through the stepper motor is alternating current.
However, the power supply of the driver that controls the stepper motor is divided into DC version and AC version, and the products of different manufacturers are somewhat different, such as EZM872 is the DC version, and the working voltage is 18~80VDC; EZM872H is AC version, working voltage is 18~80VAC.
In general, it is recommended to use the DC version, and the AC version is prone to drive damage when the motor brakes sharply.
What is the difference between a DC stepper motor and an AC stepper motor? – nema 34 hybrid stepper motor manufacturer
Is a stepper motor an AC motor or a DC motor?
DC motor.
Stepper motor is an induction motor, its working principle is to use electronic circuits, the direct current into time-sharing power supply, multi-phase timing control current, with this current to supply power to the stepper motor, stepper motor can work normally, the drive is for the stepper motor time-sharing power supply, multi-phase timing controller.
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Although stepper motors have been widely used, stepper motors are not like ordinary DC motors, AC motors are used under conventional conditions. It must be composed of a double ring pulse signal, power drive circuit, etc. to control the control system.
Ac vs dc stepper motor – difference between ac and dc stepper motor – AC vs DC stepper motor video explains YouTube
What is the difference between a DC motor and an AC motor?
1. First of all, the external power supply of the two is different, and the DC motor uses direct current as the power supply; AC motors, on the other hand, use alternating current as a power source.
stepper motor for space applications
2. Structurally, the principle of the former is relatively simple, but the structure is messy and not easy to protect; The latter principle is messy but the structure is relatively simple, and it is easier to protect than DC motors.
3. The DC motor is a magnetic field that does not move, and the conductor moves in the magnetic field; AC motors are magnetic field rotational motion, while conductors do not move.
4. In terms of speed regulation, DC motor can end smooth and economical speed regulation, without the cooperation of other equipment, only need to change the input or excitation voltage and current can end speed regulation; The AC motor itself cannot end the speed regulation, and the need to rely on frequency conversion equipment to end the speed change.
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5. The motor structure is different, the DC motor is direct current, and the rotating magnetic field will not occur directly, it relies on the commutator that rolls with the rotor to change the direction of the current entering the rotor at any time, so that the polarity of the magnetic field between the rotor stators is always opposite, so that the rotor can tumble; Because the AC motor uses alternating current, only the stator coil is arranged according to the phase, and the rotating magnetic field will naturally occur.
DC motor power supply is the choice of DC power supply, such as hourly four-wheel drive car, the dry battery used is DC power supply, the DC motor used in the factory, connected to the 220V AC power supply is through rectification equipment into DC, change the power supply voltage can dispatch the motor speed, is from the extra speed downward, but the current in the DC motor armature is alternating, why alternating?
Application of DC stepper motor
It involves the question of whether the rotor can rotate in a circle, you can go to the next book; The power supply of AC motor is AC power, because the vector control theory of AC motor proposed by German engineers and the breaking of some AC motor technology, in the field of high-performance motor control, break the exclusive situation of DC motor.
Then, the structure between the two is first composed of stator and rotor, but the respective rotors and stators are quite different, the armature of the DC motor is on the rotor, and the armature of the AC motor is on the stator.
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DC motor structure (armature, magnetic pole, commutator and brush) is relatively simple, the core component is commutator and brush (this part is the disadvantage of DC motor), AC motor (more varieties) can be divided into synchronous motor (first of all, frequency conversion speed regulation) and asynchronous motor, AC motor in the asynchronous motor air gap than the same capacity DC motor air gap is much smaller, forward power factor, should try to make the air gap smaller. Contact us WhatsApp or WeChat: +8618062443671
86mm DC stepper motor
Take single-phase motors as an example.
First of all, DC motors and AC motors are both a kind of motor, and they both operate because of the action of magnetic fields. DC can be regarded as a kind of stepper motor.
1. The motor structure is different
1) There is a coil in the AC motor, the general resistance of this coil is not very large, and it is about 100 ohms, taking phase shift as an example, it has recommended windings and running windings.
2) And the internal structure of DC motor is first composed of stator and rotor, many of them were brushed motors in the past, the rotor has a brush, the motor also has a Hall sensor, detect the orientation, in the process of operation and the conversion piece continuous replacement touch, so as to form an alternating magnetic field, constantly tumbling, DC motor volume is generally smaller than AC, now many companies are using DC brushless motor.
dc stepper motor working principle – Application of DC stepper motor
2. The operating principle is different
1) AC motor power supply voltage is alternating current, can be through AC switching components to control the motor on-off, such as thyristors, with thyristors when the voltage must be satisfied, for example, about 220AV AC motor, can use the withstand voltage value of 400VAC, and even 600VAC.
2) For DC motors, its power supply voltage is DC input, which can be controlled by PWM technology, PWM is a duty cycle dispatchable signal that can be input differently.
The figure below is a brushless DC motor output diagram, the upper and lower arms are turned on separately, and the motor output is 310V.
dc stepper motor vs Ac stepper motor
DC can browse more content, please log in to Haohua dentsu for stepless speed regulation, the speed stage can be adjusted to a very high level, and can increase the reaction signal, closed-loop speed regulation, and can carry out braking function, that is to say, it can be stopped quickly within a certain period of time, and the output stability is better. Contact us WhatsApp or WeChat: +8618062443671
3. The output power is different
Generally, DC motors are less powerful than AC motors, especially brushless motors, which defeat many shortcomings of brushed motors, but they also have disadvantages, such as resonance and other problems.
